Harness stop-motion for looms.



G. E. WHITEHEAD.

HARNESS STOP MOTION FOR LOOMS. APPLICATION FILED MAY 15,1909.

Patented Aug. 9, 1910.

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G. E. WHITEHEAD. HARNESS STOP MOTION FOR LOOMS.

APPLIOATIVON FILED M-AY 15,1909. 966,725. Patented Augri), 1910.

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To all whom it may concern:

UNITED STATES PATENT onnron.

GEORGE E. WHITEHEAD, 0F MILLBURY, MASSACHUSETTS, ASSIGNOE TO DRAPEB COM- PANY, OF HOPEDALE, iMASSACHUSETTS, A CORPORATION OF, MAINE.

HARNESS STOJP-MOTION non LOOMS.

Application filed May 15, 1909. Serial No. 496,232.

Be it known that I, GEORGE E. WHITE- -HEAD, a citizen of the United States, and

resident of Millbury, county of Worcester, State of. Massachusetts, have invented an Improvement in Harness Stop-Mo'tmns for Looms, of which the-following description,

in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts;

This invention has for' its object the production of means whereby the operation of a loom may be stopped automatically upon breakage of'an overhead suspending connection of any one of a series of reciprocating harness members.

In loom structures the harness membersare ordinarily suspended by an overhead conand a harness-cam. Should: the suspending or overhead connection break the corresponding harness-member will drop, and

if this is not discovered promptly andjthe loom stopped very serious warp andother breakage will. follow. By my present 111- vention such descentof any harness member is arranged to position abnormally a device common to all the harnessnmembers ofithe set, and such positioning is made effective to set in operation automatically -a stopping instrumentahty for the 1 loom. In the present emb'odlment of ;my

strumentalitya as .controlled ordinarily. bywarp stop-motion detectors,but so, arranged that it Wlll also operate if the overheadlcon nection of av harness member breaks. The various novel features of my 1nvn tion will be fully descilibed in the subjoined specification and particularly .pointed out in the following claims.

. Flgure 1 is a transverse sectional view and part side'elevation of a suificlent portion of a loom to be understood, the section being taken on a plane substantially through the center of the harness members or frames;

Fig. 2 is a top plah' view of a portion of the apparatus below the line 2-42, Fig. 1; Fig. 3 is'an enlarged sectional detail on the line 33, Fig. 2, looking toward the left.

In Fig: l I have shown two harnessmembers 'or frames-as H, H, the top of each 4 inven tion I have shown the loom stopping inframe in practice being connected at or near each end by a strap or other flexible member Specification of letters Patent- Patented Aug; 9, 1910,

1 with a rock shaft 2 mounted on the loom arch A so that in practice a harness mem: her will be sustained by two of the straps 'or-connections. The lower portion=of each harness member has attached thereto in usual manner a bottom bar 3 by means of short links 4, each bottom bar ,beingconnected 'by a suitable strap 5- with one of the treadles T, T operated by usual. harness cams C, C fast' on the cam shaft'C all as usual in loom structures" and operating in a manner familiar to those skilled in the art.

When the harness members areconnected in pairs, as shown iii-Fig. 1, one harness member rises when the other is depressed,

and vice versa, to thereby effect the proper reciprocation of the harness and secure the brackets 9, the said bracketsbeing sustained on .cross girths A forming a part of the loom frame. A'weighted handle 10 has its hub fixedly attached by means of a set screw 11 to the rock shaft 7, the weight of the handle being sufiicient to rockthe' shaft 7'.

and thereby elevate the arms 6 into the position shown in Fig. 1, under normal conitions, one of said arms having at its end a shoulder 12 arranged to overhang a stop 13 formed on the adjacent bearing 8 to thereby limit the upward swing of said arms, The arms 6 are'separated a sufficient distance to conveniently receive between them the straps 5 of the harness treadles, it

ness members are herein shown, my'invention is equally applicable to looms having a being understood that while only two bar-- greater number ofharness. members. The

.controlling device or carrier is provided with a stop 14, herein shown asa lateral; ear extended from the left hand'oneofthe arms 6, said stop normally'being held above'the path of movementofa feeler, shown as-a rodv 15, arranged to reciprocatelongitudinally in the dire'ction'of'warp travel, the

wforward end of the feeler resting on the shelf-like top 9 of the supporting bracket 9 and-it is also guided by a slotted ear 16 on the bracket. If the carrier 'is caused to rock path of the feeler 15 to arrest its forward movement and through such arrest the stoppage of the loom is efiected automatically by any suitable mechanism, one convenient form of which is herein shown and will be briefly referred to hereinafter. If the overhead suspending connection of a harness member should break at either corner thereof, then that particular corner will drop .down and the bottom bar 3 connected with such harness member will descend upon one or the other of the arms 6 of the stop carrier, depressing thelatter, placing the stop 14L in abnormal or operation osition. The stop carrier or controlling eviceis thus common to all of the harness members irrespective of their number, and is actuated upon the breakage of any of the overhead connections.

The harness members herein shown are of the plain .or so-called cotton harness type, and I have shown my invention in connection with a warp stop-motion which is substantially the same as disclosed in patout to Stimpson No. 673,824, granted May 7, 1901. 7

The slotted detectors d are hung on the Warp threads between the lease rods L, a dropped detector engaging and arresting a normally vibrated feeler f mounted on the feeler rock shaft F. This rock shaft 1* has a spring-controlled arm f loose thereon and an arm fast thereon, and said arms are respectively connected by links 72F, 71,3 with arms it, h, respectively, as in the Stimpson patent referred to, a follower h coiiperating with the cam 0 on the cam-shaftof the loom, such shaft also having tappets t, t as in the patent above referred to, said arms h, 71% being mounted on a hooked link M movable longitudinally in the'dircction of the arrow 100, Fig. 1, when the feeler is arrested. Such movement of the link M operates to rock the shipper releasing arm M to thereby release the shipper S from its notch in the usual holding plate N, Fig. 1, to stop the loom in usual manner. llercin I have utilized the warp stop-motion to effect normal reciprocation of the feeler 15 and to stop the loom when such reciprocaa rock shaft 71% mounted in the yoke m, and the. follower is normally pressed against the periphery of the cam C by h sp g Fig. 2, as in the Stimpson patent, the arm It being rigidly connected with or forming a part of the follower. Herein I have extended the inner end of the rock shaft 79' and. have fixedly mounted upon it the hub 17 of a rocker arm 18 pivotally connected at 19 with the rear endof the feeler 15, see Figs. 2 and 3. The cam C acting through the follower 71- rocks the shaft h" in one direction, its return movement being eflected by the action of the spring 8, and this rocking'or oscillation of the said shaft acts through the rocker arm 18 to effect, under normal condi tions, the fore and aft reciprocation of the feeler 15. lVhen thewarp stop-motion operates by reason of the arrest of the feeler f by a dropped detector d, Fig. 1, the'link M is moved in the direction of the arrow 100 by the cooperation of one of the tappets, 25,2." with a hunter, as in the Stimpson patent,

and thereby theshipper S is released. The

v the cam C upon'the follower it such movement causing the'free end of the feeler 15 to pass back beyond the stop 14, so that if the latter descends into operative position it will engage and arrest the said feeler on its next forward stroke. That will have precisely the same effect upon thev warp stop-motion mechanism as if one of the detectors d in the rear bank had dropped and had prevent d thd' swing of the feeler f rearward to the position shown in Fig. 1, and consequently the shipper will be released and the loom stopped.

Having reference to Fig. l, and remembering that each bottom bar 3 is connected by two links or jacks 4 (as they are sometimes called) it will be manifest that if one of these jacks breaks or pulls out, the bottom bar at that side will drop down upon the stop-carrier and thestop 14 will thereby be operatively positioned, and stoppage of the loom will be effected as previously described.

Thus my invention effects loom stoppage.

upon breakage of an overhead connection of a harness member, or upon breakage or detachment of an underneath connection, as will be apparent, and if the strap 5 of one harness member should break the other harncss member will descend far enough to permit its bottom bar 3 to operatively position the stop 1d.

My invention is not restricted to the particular form of warp stop-motion herein shown, for any other convenient or suitable mechanism adapted to effect the operation of the stopping instrumentality can be cmployedin lieu of the mechanism illustrated,

provided the arrest of the normally recipro- -cating feeler 15 will set in operation the loom stopping instrumentality.

Various changes or modifications may be made by those skilled in the art without departing from the spirit and scope of-my invent-ion as set forth in the annexed claims.

Having fully described my invention,-

what I claim as new and desire to secure by Letters Patent is 2. The combination, in a loom having a series of reciprocating harness members each having overhead lifting and suspending means and a bottom bar, of mechanism adapted to effect the stoppage of the loom automatically upon breaka e of a lifting and suspending means, sai mechanism ineluding a pivoted carrier having arms extended beneath the bottom bars, one of said arms having a stop thereon, and a recipr6-' eating feeler adapted to be engaged and arrested bythe stop when the carrier is abnormally positioned by engagement with a bottom bar.

3. In a loom, a plurality of reciprocating harness members, means to effect their reciprocation, connections between said means and the bottoms of the harness members, and means to effect the operation of a loomstopping instrumentality by or throughbreakage of such under connections, sald means including a stop moved into abnormal position by or through any of the harmess-members when such breakage occurs,

and a normally moving feeler to engage and be arrested by said stop when positloned abnormally. a

4. In a loom, a plurality of reciprocating harness members, means, ineluding'overhead and underneath connections, to eflfect the reciprocation of the harness members, said means to effect the operation of av loomstopping instrumentality by or through rupture of any of said connections, and means including a stop moved into abnormal position by or through any of the harnessmembers when such rupture of a connection occurs, and a normally moving feeler to engage and be arrested by said stop when positioned abnormally.

5. In a loom having a Warp stop-motion including a vibrating feeler, the combination, with a plurality of reciprocating harnesses, and means to reciprocate them, of means adapted to effect the operation of a doom-stopping instrumentality upon the falling of a harness, said means including a carrier having a stop moved into abnormal position by any harness of the series through the falling of a harness upon the carrier,and a normally reciprocating feeler toengage and be arrested by said sto whenv positioned abnormally, said feeler being independent of the first-mentioned vibrating feeler of the Warp stop-motion.

In testimony whereof, I have signed my name to this speeificatiomin the presence of two subscribing Witnesses.

GEO.- E. /W HITEHEAD.

'Wi'tnesses CHARLES A. Room, ERWIN R. LIBBY. 

